What You Need to Do Before You Lay the First Paver

Building a patio with pavers starts with preparing the ground, not with buying materials. The base determines whether your patio stays level or shifts and cracks within a year. You need to mark out the space, remove grass and topsoil, compact the soil, add a gravel base layer, and compact that too. Only after the base is solid do you set pavers in sand.

The entire process takes a weekend for a small patio (10 by 12 feet) and longer for larger spaces. You will need a shovel, a level, a rubber mallet, a wheelbarrow, and a tamper or plate compactor. Renting a plate compactor costs $40 to $80 per day and saves your back on anything larger than 100 square feet.

Key Takeaways

  • Dig out 4 to 6 inches of soil and replace it with compacted gravel base so pavers do not sink or shift.
  • Lay pavers in sand on top of the gravel, checking level every few rows and tapping them down with a rubber mallet.
  • Edge the patio with a border or edging material so pavers do not spread outward over time.
  • Sweep polymeric sand into the joints between pavers to lock them in place and prevent weeds.
  • The entire job is doable without hiring help if you have the right tools and are willing to spend a full weekend on a small space.

Mark the Patio Outline and Remove the Grass

Use stakes and string to outline the patio shape on the ground. For a rectangular patio, measure the diagonals — if they are equal, the corners are square. Mark the outline with spray paint or chalk so you can see it clearly once you start digging.

Remove all grass, weeds, and topsoil within the outline. Topsoil is dark and crumbly; you are digging until you hit harder, lighter-colored soil. For most yards, this is 2 to 3 inches down. Pile the removed soil and grass to the side — you can use it elsewhere in the yard or haul it away.

Dig and Compact the Base Layer

Dig down another 2 to 3 inches below where you removed the topsoil, so the total depth is 4 to 6 inches. The exact depth depends on your climate: colder areas with freeze-thaw cycles need 6 inches; warmer areas can use 4 inches. Compact the soil at the bottom of the hole with a tamper, pounding it firmly until it no longer gives when you step on it.

Spread 4 inches of gravel (crushed stone or pea gravel works) evenly across the hole. Compact this gravel layer the same way — firmly and thoroughly. This is the step most people rush, and it is the reason most patios fail. Spend time here. If you are using a plate compactor, make two or three passes over the entire area.

Add Sand and Set the Pavers

Spread 1 inch of sand evenly over the compacted gravel. Use a straight board laid across the edges to level the sand. Do not compact the sand; pavers sit on it and you will adjust them by tapping with the mallet.

Lay pavers in your chosen pattern, starting from one corner and working outward. Leave a consistent gap between pavers — usually 1/8 inch to 1/4 inch, depending on the paver size and the look you want. Use a level every few rows to check that pavers are not tilting. If a paver is too high, tap it down with the rubber mallet. If it is too low, lift it, add a bit more sand underneath, and reset it.

Work in sections rather than trying to lay the entire patio at once. Lay 20 to 30 pavers, check the level, adjust, then move to the next section. This prevents you from discovering halfway through that one corner is 1/2 inch higher than the other.

Install Edging to Hold Pavers in Place

Pavers spread outward over time if nothing holds them at the edges. Install edging along the perimeter before you fill the joints. Plastic edging is the cheapest option and works fine for most patios. Metal edging looks better and lasts longer. Concrete edging is permanent but requires setting it in concrete.

Nail or screw the edging to stakes driven into the ground just outside the paver line. The edging should be flush with or slightly higher than the top of the pavers so it holds them in place without being visible.

Fill Joints with Polymeric Sand

Polymeric sand hardens when wet and locks pavers together. Sweep it into the joints between pavers, working diagonally across the patio so the sand fills the gaps completely. Once the joints are full, mist the entire patio lightly with a garden hose. The water activates the polymeric binder in the sand, and it hardens over the next 24 hours.

Do not soak the patio — a light mist is enough. Too much water can wash the sand out of the joints or cause it to harden unevenly. After 24 hours, the patio is ready to use.

Common Mistakes That Cause Problems Later

Skipping or rushing the base layer is the most common mistake. Pavers will sink, shift, and crack if the gravel is not compacted. The second mistake is not checking level as you go. Catching a tilted section early takes five minutes; fixing it after you have laid 200 pavers takes hours.

The third mistake is forgetting edging. Pavers spread outward, especially in freeze-thaw climates, and the patio becomes uneven. The fourth is using regular sand instead of polymeric sand in the joints. Regular sand washes out in rain, weeds grow between pavers, and the whole thing falls apart faster.

The fifth mistake is not allowing the polymeric sand to cure before using the patio. Wait the full 24 hours before walking on it or allowing rain.

Frequently Asked Questions

Can I build a patio on top of existing concrete?

Yes, but only if the concrete is level and not cracked. Lay pavers directly on the concrete with a thin layer of sand underneath, or use a concrete adhesive. If the concrete is cracked or uneven, the pavers will follow those imperfections and the patio will look uneven.

What is the best paver material for durability?

Concrete pavers are affordable and durable in most climates. Natural stone (flagstone, bluestone, slate) lasts longer and looks better but costs two to three times as much. Permeable pavers allow water to drain through, which is useful in areas with heavy rain or flooding. Choose based on your budget and climate.

How do I keep weeds from growing between pavers?

Polymeric sand prevents most weeds by filling the joints completely. If weeds still appear, pull them by hand or spray with a weed killer made for pavers. Do not use salt, which damages the pavers and surrounding soil.

Do I need to seal pavers after installation?

Sealing is optional and depends on the paver material and your climate. Concrete pavers benefit from sealing in areas with heavy rain or freeze-thaw cycles, as sealing prevents water absorption and reduces cracking. Natural stone pavers often come pre-sealed. Sealing lasts two to three years and costs $0.50 to $1.50 per square foot.

What should I do if pavers sink or shift after installation?

Small shifts are normal in the first few months as the base settles. If a paver sinks more than 1/4 inch or shifts noticeably, lift it, add sand underneath, and reset it. If multiple pavers sink, the base may not have been compacted enough, and you may need to remove a section and redo the base layer.